Tools & Wizards About Us
dirkbertels.net screenshot

Report Summary

  • 99

    Performance

    Renders faster than
    96% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 50

    SEO

    Google-friendlier than
    18% of websites

dirkbertels.net

Dirk Bertels - Home Page

Page Load Speed

5.1 sec in total

First Response

711 ms

Resources Loaded

4 sec

Page Rendered

419 ms

dirkbertels.net screenshot

About Website

Click here to check amazing Dirk Bertels content. Otherwise, check out these important facts you probably never knew about dirkbertels.net

Dirk Bertels: Music, computing, maths

Visit dirkbertels.net

Key Findings

We analyzed Dirkbertels.net page load time and found that the first response time was 711 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

dirkbertels.net performance score

99

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.2 s

99/100

10%

LCP (Largest Contentful Paint)

Value1.2 s

100/100

25%

SI (Speed Index)

Value3.0 s

94/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.6 s

100/100

10%

Network Requests Diagram

dirkbertels.net

711 ms

dirkbertels.net

919 ms

xtree.js

225 ms

style.css

452 ms

xtree.css

676 ms

Our browser made a total of 19 requests to load all elements on the main page. We found that all of those requests were addressed to Dirkbertels.net and no external sources were called. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Dirkbertels.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 120.4 kB (67%)

Content Size

179.2 kB

After Optimization

58.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dirkbertels.net main page is 179.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 10% of websites need less resources to load. HTML takes 129.3 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 115.8 kB

  • Original 129.3 kB
  • After minification 125.3 kB
  • After compression 13.4 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 115.8 kB or 90% of the original size.

Image Optimization

-0%

Potential reduce by 94 B

  • Original 37.4 kB
  • After minification 37.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Dirk Bertels images are well optimized though.

JavaScript Optimization

-36%

Potential reduce by 3.2 kB

  • Original 9.0 kB
  • After minification 9.0 kB
  • After compression 5.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 3.2 kB or 36% of the original size.

CSS Optimization

-37%

Potential reduce by 1.3 kB

  • Original 3.4 kB
  • After minification 3.4 kB
  • After compression 2.2 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Dirkbertels.net needs all CSS files to be minified and compressed as it can save up to 1.3 kB or 37% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (47%)

Requests Now

17

After Optimization

9

  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dirk Bertels. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

dirkbertels.net

dirkbertels.net

711 ms

dirkbertels.net

dirkbertels.net

919 ms

xtree.js

xtree.js

225 ms

style.css

style.css

452 ms

xtree.css

xtree.css

676 ms

tree.js

tree.js

706 ms

me.jpg

me.jpg

493 ms

bg.png

bg.png

226 ms

top_01.jpg

top_01.jpg

450 ms

somerights.jpg

somerights.jpg

226 ms

home.gif

home.gif

1397 ms

Tplus.png

Tplus.png

1396 ms

foldericon.png

foldericon.png

1399 ms

I.png

I.png

1404 ms

T.png

T.png

1405 ms

file.png

file.png

1405 ms

L.png

L.png

1613 ms

Lplus.png

Lplus.png

1618 ms

blank.png

blank.png

1622 ms

Accessibility Review

dirkbertels.net accessibility score

61

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

Best Practices

dirkbertels.net best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

dirkbertels.net SEO score

50

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-15

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dirkbertels.net can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Dirkbertels.net main page’s claimed encoding is iso-8859-15. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

dirkbertels.net

Open Graph description is not detected on the main page of Dirk Bertels. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: